Development and psychometric evaluation of the gambling treatment outcome monitoring system (GAMTOMS)

Psychol Addict Behav. 2007 Jun;21(2):174-84. doi: 10.1037/0893-164X.21.2.174.

Abstract

This article describes the development and initial reliability and validity estimates of the Gambling Treatment Outcome Monitoring System (GAMTOMS), a multi-instrument and multidimensional outcome assessment battery designed to measure gambling treatment outcomes. Reliability methods included both internal consistency of scales and a 1-week test-retest temporal stability procedure. Validity was examined with procedures to estimate content, convergent, discriminant, predictive, and construct validity. Data were collected from 2 separate studies, 1 on the questionnaire version and 1 on the interview version. The questionnaire study included 46 female and 41 male gambling treatment clients and 22 female and 2 male nonclinical participants. The interview study included 88 female and 62 male gambling treatment clients and 16 female and 9 male nonclinical participants. The GAMTOMS was found to yield satisfactory estimates of internal consistency, and 1-week test-retest reliability and was also found to demonstrate satisfactory content, convergent, discriminant, predictive, and construct validity.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Behavior, Addictive / psychology*
  • Behavior, Addictive / therapy*
  • Discriminant Analysis
  • Female
  • Gambling*
  • Humans
  • Male
  • Middle Aged
  • Predictive Value of Tests
  • Psychometrics*
  • Reproducibility of Results
  • Surveys and Questionnaires
  • Treatment Outcome